Of course in the long run it makes plenty of sense for Facebook to offer Home for iOS. But the mere fact that Home is not available for iOS right now adds to the perception that Apple is no longer in the forefront of what people want.

Putting aside the debate over whether Facebook has any authority to define what people want, Mr. Arora doesn't understand app development or the capabilities an app has on the various platforms. No doubt Facebook would have loved having "Home" on iOS, probably preferring to have it on iOS first given the statistics showing iOS users have a higher propensity to spend money vs. Android users. But they couldn't release this on iOS because an app can't take over the system to the extent that Home does. Apple won't give another company the opportunity to effectively rebrand a phone for their own use. Neither will Microsoft. I would be surprised if Blackberry gave Facebook this control.

Facebook did this on Android because it's the only platform that they could do it on without permission of the platform developer (Google). Google is likely furious about this. Samsung is likely just as unhappy at the prospect of all their hard work building the Galaxy brand being subverted by an app that pushes that aside -- after all, this is just version 1.0. Over time, expect Facebook to continue taking over more and more functionality of an Android phone.

Google is facing a future where the platform they popularized for the purpose of pushing their own services is taken over by their competitors. What then? They'll have to go back to competing as a third party on other vendors platforms. They've alienated and grown a competitor in Apple. They've pushed Samsung in the direction of becoming a competitor.

It's possible that Android will end up being the worst thing to ever happen to Google.